How to Remove Special Character from String in PHP ?

We have given a string and the task is to remove special characters from a string str in PHP. In order to do this task, we have the following methods in PHP:

Method 1: Using str_replace() Method: The str_replace() method is used to remove all the special character from the given string str by replacing these character with the white space (” “).

Syntax:

str_replace( $searchVal, $replaceVal, $subjectVal, $count )

Example :

PHP

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<?php
// PHP program to Remove 
// Special Character From String
    
// Function to remove the spacial 
function RemoveSpecialChar($str) {
      
    // Using str_replace() function 
    // to replace the word 
    $res = str_replace( array( '\'', '"',
    ',' , ';', '<', '>' ), ' ', $str);
      
    // Returning the result 
    return $res;
    }
  
// Given string
$str = "Example,to remove<the>Special'Char;"
  
// Function calling
$str1 = RemoveSpecialChar($str); 
  
// Printing the result
echo $str1
?>

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Output



Example to remove the Special Char 

Method 2: Using str_ireplace() Method: The str_ireplace() method is used to remove all the special character from the given string str by replacing these character with the white space (” “). The difference between str_replace and str_ireplace is that str_ireplace is a case-insensitive.

Syntax:

str_ireplace( $searchVal, $replaceVal, $subjectVal, $count )

Example :

PHP

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<?php
// PHP program to Remove 
// Special Character From String
    
// Function to remove the spacial 
function RemoveSpecialChar($str){
      
    // Using str_ireplace() function 
    // to replace the word 
    $res = str_ireplace( array( '\'', '"',
    ',' , ';', '<', '>' ), ' ', $str);
      
    // returning the result 
    return $res;
    }
  
// Given string
$str = "Example,to remove<the>Special'Char;"
  
// Function calling
$str1 = RemoveSpecialChar($str); 
  
// Printing the result
echo $str1
?>

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Output

Example to remove the Special Char 

Method 3: Using preg_replace() Method: The preg_replace() method is used to perform a regular expression for search and replace the content.

Syntax:

preg_replace( $pattern, $replacement, $subject, $limit, $count )

Example :

PHP

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<?php
// PHP program to Remove 
// Special Character From String
    
// Function to remove the spacial 
function RemoveSpecialChar($str){
      
    // Using preg_replace() function 
    // to replace the word 
    $res = preg_replace('/[^a-zA-Z0-9_ -]/s',' ',$str);
      
    // Returning the result 
    return $res;
}
  
// Given string
$str = "Example,to remove<the>Special'Char;"
  
// Function calling
$str1 = RemoveSpecialChar($str); 
  
// Printing the result
echo $str1
?>

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Output

Example to remove the Special Char 



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